document.write( "Question 145344: The average age of the two Jones children is 5. The average of the three Smith children is 15. The average age of the five children together is? \n" ); document.write( "
Algebra.Com's Answer #106025 by solver91311(24713)\"\" \"About 
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If the average age of the two Jones children is 5, then the sum of their ages must be 10, because the average of two values is computed by \"AVG=%28x%5B1%5D%2Bx%5B2%5D%29%2F2\". Likewise the sum of the 3 Smith childrens' ages must be \"3%2A15=45\". That means the sum of all 5 childrens' ages must be \"10%2B45=55\", and the average of the 5 is \"55%2F5=11\" \n" ); document.write( "
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